The plural form for the noun rivalry is rivalries.
Oligopoly structure
No, because of two reasons. An oligopoly is a market form in which a market or industry is dominated by a small number of sellers (oligopolists). BP is not a market form, but a global oil company. And BP is certainly not small.
oligopoly
Oligopoly!
Oligopoly
Oligopolistic
in oligopoly what is the nature of price elasticity
Oligopoly is a market from where large numbers of buyers contact few sellers for the purpose of buying and selling things. The different types are a pure oligopoly, a differentiated oligopoly, a collusive oligopoly, and a non-collusive oligopoly.
An oligopoly is an intermediate market structure between the extremes of perfect competition and monopoly. Oligopoly firms might compete (noncooperative oligopoly) or cooperate (cooperative oligopoly) in the Marketplace.
Oligopoly
I will probably say its more of oligopoly.